2674 search results - page 112 / 535 » Data Models and Query Languages for Spatial Databases |
137
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CIKM
2009
Springer
15 years 9 months ago
2009
Springer
RDF is a data model for representing labeled directed graphs, and it is used as an important building block of semantic web. Due to its flexibility and applicability, RDF has bee...
112
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ENTCS
2006
15 years 2 months ago
2006
Data integration systems provide a uniform query interface (UQI) to multiple, autonomous data sources [4]. This paper presents the universal data model (UDM) that captures the sem...
124
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LPNMR
2009
Springer
15 years 9 months ago
2009
Springer
Abstract. We study the complexity of consistency checking and query answering on incomplete databases for languages ranging from non-recursive Datalog to disjunctive Datalog with n...
210
Voted
GIS
2006
ACM
16 years 3 months ago
2006
ACM
Efficient evaluation of spatial queries is an important issue in spatial database. Among spatial operations, spatial join is very useful, intersection being the most common predic...
160
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EDBT
2008
ACM
16 years 2 months ago
2008
ACM
Recently, many new applications, such as sensor data monitoring and mobile device tracking, raise up the issue of uncertain data management. Compared to "certain" data, ...